Question

Evaluate the polynomial two ways:by substituting in the given value of x, and by using synthetic division: Find P(-4) for P(x)=x^4+2x^3-13x^2-39

Answer 1

P(-4) = (-4)^4 +2*(-4)^3 -13*(-4)^2 -39
=256-128-208-39
=-119

synthetic division:
-4 | 1 2 -13 0 -39
-4 8 20 -80
-------------------------
1 -2 -5 20 -119

Answer 2

Thanks so much.

Answer 3

your welcome

Answer 4

Do you have any idea of how to work this one? approximate to two decimal places, find the x-intercepts, local maximum and local minimum: p(x)=x^3+2x^2-7x-5

Answer 5

it doesnt factor so you need to graph the function or plot points to identify those points